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What is boolean in C?
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A boolean is a data type in the C Standard Library which can store true or false. Every non-zero value corresponds to true while 0 corresponds to false.
The boolean works as it does in C++. However, if you don’t include the header file stdbool.h, the program will not compile.
Another option is to define our own data type using typedef, which takes the values true and false:
typedef enum {false, true} bool;
However, it is safer to rely on the standard boolean in stdbool.h.
Examples
1. Using the header file stdbool.h
#include <stdio.h>#include <stdbool.h>int main() {bool x = false;if(x){printf("x is true.");}else{printf("x is false.");}}
2. Using typedef
#include <stdio.h>typedef enum {false, true} bool;int main() {bool x = false;if(x){printf("x is true.");}else{printf("x is false.");}}
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